FHC (.fhc)
.fhc file signature | image/x-freehand
Magic Bytes
Offset 0
41 47 44 32
Sources: Apache Tika
All Known Signatures
6 signature variants are documented for .fhc files across multiple sources.
| Hex Signature | Offset | Sources |
|---|---|---|
| 41 47 44 32 | 0 | Apache Tika |
| 41 47 44 33 | 0 | Apache Tika |
| 41 47 44 34 | 0 | Apache Tika |
| 46 72 65 65 48 61 6E 64 31 30 | 0 | Apache Tika |
| 46 72 65 65 48 61 6E 64 31 31 | 0 | Apache Tika |
| 46 72 65 65 48 61 6E 64 31 32 | 0 | Apache Tika |
Extension
.fhc
MIME Type
image/x-freehand
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .fhc files in Python
def is_fhc(file_path: str) -> bool:
"""Check if file is a valid FHC by magic bytes."""
signature = bytes([0x41, 0x47, 0x44, 0x32])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .fhc files in Node.js
function isFHC(buffer: Buffer): boolean {
const signature = Buffer.from([0x41, 0x47, 0x44, 0x32]);
return buffer.subarray(0, 4).equals(signature);
}How to validate .fhc files in Go
func IsFHC(data []byte) bool {
signature := []byte{0x41, 0x47, 0x44, 0x32}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
/api/v1/fhc
curl https://filesignature.org/api/v1/fhc
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .fhc file?
A .fhc file is a FHC file.
What are the magic bytes for .fhc files?
The magic bytes for FHC files are 41 47 44 32 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .fhc file?
To validate a .fhc file, read the first bytes of the file and compare them against the known magic bytes (41 47 44 32) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .fhc files?
The primary MIME type for .fhc files is image/x-freehand.
Is it safe to open .fhc files?
FHC (.fhc) files are generally safe to open. They are classified as low risk because they primarily contain data rather than executable code. However, always ensure files come from a trusted source.